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    75A 3-phase EMI Line Filter for welding machines

    75A 3-phase EMI filter with dual stage is designed for general purpose power line filtering and due to its excellent attenuation performance, it can improve the stability of equipment such as welding machines.
    SKU: ATO460-75
    Free shipping
    Delivery date: 6-12 days

    75A power line filter, EMI/RFI is avaliable in dual-stage configuration, enhancing its performance in anti-interference and can protect the equipment from electromagnetic interference.


    Basics Model ATO460-75
    Type 3-phase dual-stage
    Operating temperature -25℃~85℃
    Weight 7kg
    Installation Screw M8
    Technical parameters Rated voltage(Max) 440V AC
    Operating frequency 50/60Hz
    Hipot rating(one minute) Line to line 2250V DC
    Line to ground 2700V DC
    Rated current(@ 40℃) 75A
    Insulation Resistance(Line to ground) 200MΩ @ 500V DC for one minute
    Capacitance(CY) 220nF
    Insertion loss in dB (measured in 50Ω system)
    Frequency(MHz) 0.1 0.15 0.5 1 5 10 30
    Common mode(line to ground) 18 30 50 55 55 52 36
    Differential mode (line to line) 28 70 90 90 80 79 52



    A: 260mm B: 286±2.5mm C: 314mm D: 140±1.0mm E: 175mm F: 107mm G: 8.8*14mm H: M8

    Electrical schematic

    3 phase 2 stage filter electrical schematic

    Tips: What is low pass filter?
    Low pass filter is an electrical filter device which only allows the signal lower than cut-off frequency to pass, and all the signal higher than cut-off frequency can’t pass. The performance of low pass filter in signal processing is similar to the rolling average performance in finance field. For different filter, the weakening degree of each frequency signal is different. Low pass filter has many types, of which, Butterworth, Chebyshev are often used.
    Low pass filter principle is very simple, making use of capacitor to pass high frequency and prevent low frequency, and inductor for low frequency pass and high frequency stop. The principle of low pass filter is, for the cut-off high frequency, prevent it by capacitor absorbing and inductor blocking; for low frequency needed, make it pass via the characteristics of capacitor with high resistance and inductive with low resistance.

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